:category:September 11 attacks
{{Commons category|September 11 attacks}}
{{Cat main|September 11 attacks}}
Articles relating to the September 11 attacks, four coordinated Islamist terrorist suicide attacks carried out by al-Qaeda against the United States in 2001.
{{Category see also|World Trade Center}}
Category:2001 in international relations
Category:2001 in New York City
Category:2001 murders in the United States
Category:2000s crimes in New York City
Category:2000s crimes in Pennsylvania
Category:2000s crimes in Virginia
Category:Mass murder in the United States in the 2000s
Category:Airliner accidents and incidents caused by hijacking
Category:Airliner accidents and incidents involving deliberate crashes
Category:Anti-Western sentiment
Category:Building and structure collapses in 2001
Category:Attacks on military installations in the United States
Category:Attacks on military installations in 2001
Category:Attacks on office buildings in the United States
Category:Aviation accidents and incidents in the United States in 2001
Category:Building and structure collapses in the United States
Category:Disasters in Pennsylvania
Category:Disasters in Virginia
Category:High-rise fires in the United States
Category:Islamic fundamentalism in the United States
Category:Islamic terrorism in New York (state)
Category:Islamic terrorism in the United States
Category:Islamic terrorist incidents in 2001
Category:Massacres in the United States
Category:Mass murder in New York City
Category:Mass murder in Pennsylvania
Category:Mass murder in Virginia
Category:Murder–suicides in New York City
Category:Murder–suicides in Pennsylvania
Category:Murder–suicides in Virginia
Category:Presidency of George W. Bush
Category:September 2001 crimes in the United States
Category:Terrorist incidents in New York City
Category:Terrorist incidents in Pennsylvania
Category:Terrorist incidents in the United States in 2001
Category:Terrorist incidents in Virginia
Category:Wikipedia categories named after terrorist incidents
Category:Wikipedia categories named after transportation disasters
Category:Attacks on buildings and structures in New York City
Category:Attacks on buildings and structures in Pennsylvania
Category:Attacks on buildings and structures in Virginia
Category:Filmed murder–suicides